<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script type="text/javascript" src="Demo02.js"></script>
<title>通过关系(父子关系、兄弟关系)找标签</title>
</head>

<body onload="ready()">
    <input type="button" id="userName"  value="set"/>
    <input type="button" value="按钮" />
</body>

</html>
